A facile synthesis of highly stable and luminescent Ag clusters: a steady-state and time-resolved spectroscopy study

被引：16

作者：

Pal, Nabin Kumar ^{[1
]}

Kryschi, Carola ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Dept Chem & Pharm, D-91054 Erlangen, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2015年 / 17卷 / 03期

关键词：

FLUORESCENT SILVER NANOCLUSTERS; PHYSICOCHEMICAL PROPERTIES; ELECTROCHEMICAL SYNTHESIS; SONOCHEMICAL SYNTHESIS; GOLD NANOCLUSTERS; NANOPARTICLES; BLUE;

D O I：

10.1039/c4cp03683b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, we reported a very simple and environmentally friendly procedure for the synthesis of bright luminescent and nearly monodisperse Ag nanoclusters stabilized by a poly(N-vinylpyrrolidone) homopolymer. In this synthesis route acetonitrile or N,N-dimethylformamide (DMF) acts as both solvent and a reducing agent at their respective reflux temperatures. The as-prepared Ag clusters were found to be highly stable in various solvents as well as show nearly no changes in their emission intensity in solutions with different pH values and ionic strengths. Remarkably, the acetonitrile method predominantly produces blue emitting Ag clusters with a photoluminescence (PL) emission maximum at 424 nm (quantum yield 3.5%), whereas mainly blue-green emitting Ag clusters with the PL emission maximum at 450 nm (quantum yield 2.7%) were formed using the DMF method. The photo-physical, electronic, structural and morphological properties of the Ag clusters were investigated by performing UV/Vis absorption spectroscopy, stationary and time-resolved PL spectroscopy, X-ray photoelectron spectroscopy, femtosecond transient absorption spectroscopy, and transmission electron microscopy experiments.

引用

页码：1957 / 1965

页数：9

共 51 条

[1] Facile Synthesis of Water-Soluble Fluorescent Silver Nanoclusters and HgII Sensing [J].

Adhikari, Bimalendu ;

Banerjee, Arindam .

CHEMISTRY OF MATERIALS, 2010, 22 (15) :4364-4371

[2] Silver Nanoclusters: Single-Stage Scaleable Synthesis of Monodisperse Species and Their Chirooptical Properties [J].

Cathcart, Nicole ;

Kitaev, Vladimir .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (38) :16010-16017

[3] Quantum dot bioconjugates for ultrasensitive nonisotopic detection [J].

Chan, WCW ;

Nie, SM .

SCIENCE, 1998, 281 (5385) :2016-2018

[4] Utilizing polyethyleneimine-capped silver nanoclusters as a new fluorescence probe for Sudan I-IV sensing in ethanol based on fluorescence resonance energy transfer [J].

Chen, Ning Yu ;

Li, Hong Fei ;

Gao, Zhong Feng ;

Qu, Fei ;

Li, Nian Bing ;

Luo, Hong Qun .

SENSORS AND ACTUATORS B-CHEMICAL, 2014, 193 :730-736

[5] Blue, green and red emissive silver nanoclusters formed in organic solvents [J].

Diez, Isabel ;

Kanyuk, Mykola I. ;

Demchenko, Alexander P. ;

Walther, Andreas ;

Jiang, Hua ;

Ikkala, Olli ;

Ras, Robin H. A. .

NANOSCALE, 2012, 4 (15) :4434-4437

[6] Preparation and Spectroscopic Properties of Monolayer-Protected Silver Nanoclusters [J].

Farrag, Mostafa ;

Thaemer, Martin ;

Tschurl, Martin ;

Buergi, Thomas ;

Heiz, Ueli .

JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (14) :8034-8043

[7] Fluorescent Ag Clusters via a Protein-Directed Approach as a Hg(II) Ion Sensor [J].

Guo, Cunlan ;

Irudayaraj, Joseph .

ANALYTICAL CHEMISTRY, 2011, 83 (08) :2883-2889

[8] Oligonucleotide-stabilized Ag nanoclusters as novel fluorescence probes for the highly selective and sensitive detection of the Hg2+ ion [J].

Guo, Weiwei ;

Yuan, Jipei ;

Wang, Erkang .

CHEMICAL COMMUNICATIONS, 2009, (23) :3395-3397

[9] When gold is not noble: Catalysis by nanoparticles [J].

Haruta, A .

CHEMICAL RECORD, 2003, 3 (02) :75-87

[10] PHYSICOCHEMICAL PROPERTIES OF SMALL METAL PARTICLES IN SOLUTION - MICROELECTRODE REACTIONS, CHEMISORPTION, COMPOSITE METAL PARTICLES, AND THE ATOM-TO-METAL TRANSITION [J].

HENGLEIN, A .

JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (21) :5457-5471

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